Production apparatus and production method for colored spun yarn with fiber dyeing and mixing in spinning process

ABSTRACT

A production apparatus and production method for colored spun yarn with fiber dyeing and mixing in a spinning process is provided. The production apparatus is a ring spinning machine. The ring spinning machine includes a front table board and a rear table board with a same structure. Each of the front table board and the rear table board is formed by a plurality of spindles with a same structure. Each spindle includes a drafting system. A roving feeding bell mouth is connected at the rear of the drafting system, and a splitting plate is arranged at the front of the drafting system. A dyeing system is arranged at the front of the splitting plate. A color fixing system is added at the front of the dyeing system. A bunching bell mouth device and a delivery roller pair are arranged at the front of the color fixing system.

CROSS REFERENCE TO THE RELATED APPLICATIONS

This application is the national phase entry of International Application No. PCT/CN2018/121421, filed on Dec. 17, 2018, which is based upon and claims priority to Chinese Patent Application No. 201811018583.5, filed on Sep. 3, 2018 the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the field of textile technologies, and specifically, to a production apparatus and production method for colored spun yarn with fiber dyeing and mixing in a spinning process.

BACKGROUND

Consumers' habits have been changing along with the ongoing social and economic development and people's growing living standards. Clothes are expected to be more functional and wearable, and are especially expected to be more germproof, healthful, and agreeable to touch, among other things. Further, the economic development witnesses increasingly wide application of various functional fibers and textiles. Therefore, increasing efforts are directed to the research and development of fiber materials with various special functions, and the fiber family keeps expanding with varied functional fiber materials. However, various existing functional fibers are usually superior in merely one of many aspects. For example, being exceptionally germproof, the bamboo charcoal fiber is yet less agreeable to touch, not skin friendly enough, poorly cohesive, and inadequately spinnable. Therefore, several fibers need to be mixed to produce a comprehensively adequate functional textile. How to choose different types and different proportions of fibers to fully and uniformly mix the fibers and how to choose a spinning process to spin the fibers into comprehensively adequate high-quality functional yarn are problems that urgently need to be resolved currently.

To make colored spun yarn, fibers are dyed first to obtain colored fibers, and two or more fibers with different colors are then fully mixed before being spun into yarn with a unique mixed color. Colored spun yarn can have a vaguely three-dimensional effect and texture, which cannot be achieved by dyeing a blank. The use of colored spun yarn is free of pollution, and color difference can be minimized. Therefore, with delicate and fashionable colors and being adaptive to flexible production of small batches and various types, colored spun yarn is increasingly applied to middle- and high-end clothing products. A new process of “dyeing before spinning” is used to make colored spun yarn, so that production processes of post-treatment enterprises are shortened, production costs are reduced, and relatively high added values are obtained. Compared with the conventional process of “spinning before dyeing”, colored-yarn products are advantageous over other textile products, and therefore are highly competitive in the market and have bright prospects in the market. However, such conventional colored spun yarn still requires fiber dyeing, leading to partial pollution. In addition, in the existing field of textile treatments with growing competition, the production efficiency of colored spun yarn still needs to be improved.

SUMMARY

An objective of the present invention is to provide a production apparatus and production method for colored spun yarn with fiber dyeing and mixing in a spinning process, so that a fiber dyeing process and a color mixing process in the production of colored spun yarn are simultaneously completed in a spinning process, thereby greatly improving the production efficiency of colored spun yarn.

To achieve the foregoing objective, the technical solution adopted in the present invention is as follows: A production apparatus for colored spun yarn with fiber dyeing and mixing in a spinning process uses a ring spinning machine for spinning. The ring spinning machine is formed by 420 spindles or 516 spindles or 1028 spindles with an identical structure. Each spindle includes a drafting system. The ring spinning machine includes a front table board and a rear table board. The front table board and the rear table board have an identical structure. Each of the front table board and the rear table board is formed by 210 spindles or 258 spindles or 524 spindles with an identical structure. The drafting system includes a rear roller drafting pair formed by a rear bottom roller and an rear top rubber roller, a middle roller drafting pair formed by a middle bottom roller and an middle top rubber roller, and a front roller drafting pair formed by a front bottom roller and an front top rubber roller. A roving feeding bell mouth is arranged at the rear of the rear roller drafting pair. The rear bottom roller, the middle bottom roller, and the front bottom roller have a same structure. The rear bottom roller, the middle bottom roller, and the front bottom roller are arranged from rear to front in a straight line at 45 degrees from a horizontal transverse line. Each of the rear bottom roller, the middle bottom roller, and the front bottom roller includes a roller shaft. The roller shaft is a solid cylindrical iron or steel structure. For all the spindles of the front table board, the roller shafts of the rear bottom rollers are integrally connected, the roller shafts of the middle bottom rollers are integrally connected, and the roller shafts of the front bottom rollers are integrally connected. For all the spindles of the rear table board, the roller shafts of the rear bottom rollers are integrally connected, the roller shafts of the middle bottom rollers are integrally connected, and the roller shafts of the front bottom rollers are integrally connected. The roller shaft is integrally sleeved with a roller sleeve. The material of the roller sleeve is the same as that of the roller shaft. The roller sleeve of each spindle is independent. The rear top rubber roller, the middle top rubber roller, and the front top rubber roller have a same structure. Each of the rear top rubber roller, the middle top rubber roller, and the front top rubber roller includes a rubber roller shaft. The rubber roller shaft is a solid cylindrical iron or steel structure. For one spindle, the rubber roller shaft of the rear top rubber roller and the rubber roller shaft of the rear top rubber roller of an adjacent spindle thereof on the right side are integrally connected, the rubber roller shaft of the middle top rubber roller and the rubber roller shaft of the middle top rubber roller of the adjacent spindle thereof on the right side are integrally connected, and the rubber roller shaft of the front top rubber roller and the rubber roller shaft of the front top rubber roller of the adjacent spindle thereof on the right side are integrally connected. The rubber roller shaft is connected to a rubber roller sleeve by a bearing. The rubber roller sleeve is made of a rubber material. A middle portion of the rubber roller shafts of two spindles whose rubber roller shafts are integrally connected is inserted in an independent gripper of a pressuring assembly to achieve connection of the rear top rubber roller, the middle top rubber roller, and the front top rubber roller.

A splitting plate is arranged at the front of the front roller drafting pair. The splitting plate is an arc-shaped structure. The splitting plates of all the spindles of the front table board are integrally connected. The splitting plates of all the spindles of the rear table board are integrally connected. The left and right ends of the splitting plate are fixed at the front table board or the rear table board. The arc of the splitting plate is ¼ of the circumference. Splitting teeth are provided in the arc direction of the splitting plate on each spindle. The splitting teeth include level-1 splitting teeth, level-2 splitting teeth, and level-3 splitting teeth. The level-1 splitting teeth, the level-2 splitting teeth, and the level-3 splitting teeth are sequentially connected and arranged from rear to front in the arc direction of the splitting plate. The arrangement density of the level-1 splitting teeth is less than the arrangement density of the level-2 splitting teeth. The arrangement density of the level-2 splitting teeth is less than the arrangement density of the level-3 splitting teeth. The rear ends of the level-1 splitting teeth are located at the rearmost end in the arc direction of the splitting plate. The front ends of the level-3 splitting teeth are located at the frontmost end in the arc direction of the splitting plate. A dyeing system is arranged at the front of the splitting plate of each spindle. The dyeing system includes a rear-row dyeing device, a middle-row dyeing device, and a front-row dyeing device. The rear-row dyeing device, the middle-row dyeing device, and the front-row dyeing device are arranged in parallel in the front-rear direction.

The rear-row dyeing device includes red dyeing rings. The number of the red dyeing rings is the same as that of splitting channels in the level-3 splitting teeth. The red dyeing ring is located right in front of the splitting channel in the level-3 splitting teeth. A first vertical rod is fixedly connected at the bottom end of the red dyeing ring. The top end of the first vertical rod is fixedly connected to the red dyeing ring. The bottom end of the first vertical rod is movably inserted in a first horizontal rod. Grooves are provided in the first horizontal rod at equal intervals. The number of the grooves is the same as that of the first vertical rods. The bottom end of the first vertical rod is movably inserted in the groove in the first horizontal rod to support the first vertical rod. The first horizontal rods on all the spindles of the front table board are integrally connected. The first horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the first horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the first horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board. A second horizontal rod is arranged above the first horizontal rod. First expandable holes are provided in the second horizontal rod at equal intervals. The first expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the first expandable holes is the same as that of the red dyeing rings. The first vertical rod at the bottom end of each red dyeing ring passes through the first expandable hole. The first horizontal rods on all the spindles of the front table board are integrally connected. The first horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the first horizontal rod located at the left end of the front table board is fixed on the front table board by a first vertical lifting rod. The right end point of the first horizontal rod located at the right end of the front table board is fixed on the front table board by a second vertical lifting rod. The left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board by a third vertical lifting rod. The right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board by a fourth vertical lifting rod. The first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod are driven together by a first motor to ascend or descend.

The middle-row dyeing device includes yellow dyeing rings. The number of the yellow dyeing rings is the same as that of the red dyeing rings. The yellow dyeing ring is located right in front of the red dyeing ring. The bottom end of the yellow dyeing ring is fixedly connected to a second vertical rod. The top end of the second vertical rod is fixedly connected to the yellow dyeing ring. The bottom end of the second vertical rod is movably inserted in a third horizontal rod. Grooves are provided in the third horizontal rod at equal intervals. The number of the grooves is the same as that of the second vertical rods. The bottom end of the second vertical rod is movably inserted in the groove in the third horizontal rod to support the second vertical rod. The third horizontal rods on all the spindles of the front table board are integrally connected. The third horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the third horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the third horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the third horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board. A fourth horizontal rod is arranged above the third horizontal rod. Second expandable holes are provided in the fourth horizontal rod at equal intervals. The second expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the second expandable holes is the same as that of the yellow dyeing rings. The second vertical rod at the bottom end of each yellow dyeing ring passes through the second expandable hole. The fourth horizontal rods on all the spindles of the front table board are integrally connected. The fourth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the fourth horizontal rod located at the left end of the front table board is fixed on the front table board by a fifth vertical lifting rod. The right end point of the fourth horizontal rod located at the right end of the front table board is fixed on the front table board by a sixth vertical lifting rod. The left end point of the fourth horizontal rod located at the left end of the rear table board is fixed on the rear table board by a seventh vertical lifting rod. The right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board by an eighth vertical lifting rod. The fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod are driven together by a second motor to ascend or descend.

The front-row dyeing device includes blue dyeing rings. The number of the blue dyeing rings is the same as that of the yellow dyeing rings. The blue dyeing ring is located right in front of the yellow dyeing ring. The bottom end of the blue dyeing ring is fixedly connected to a third vertical rod. The top end of the third vertical rod is fixedly connected to the blue dyeing ring. The bottom end of the third vertical rod is movably inserted in a fifth horizontal rod. Grooves are provided in the fifth horizontal rod at equal intervals. The number of the grooves is the same as that of the third vertical rods. The bottom end of the third vertical rod is movably inserted in the groove in the fifth horizontal rod to support the third vertical rod. The fifth horizontal rods on all the spindles of the front table board are integrally connected. The fifth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the fifth horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the fifth horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the fifth horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the fifth horizontal rod located at the right end of the rear table board is fixed on the rear table board. A sixth horizontal rod is arranged above the fifth horizontal rod. Third expandable holes are provided in the sixth horizontal rod at equal intervals. The third expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the third expandable holes is the same as that of the blue dyeing rings. The third vertical rod at the bottom end of each blue dyeing ring passes through the third expandable hole. The sixth horizontal rods on all the spindles of the front table board are integrally connected. The sixth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the sixth horizontal rod located at the left end of the front table board is fixed on the front table board by a ninth vertical lifting rod. The right end point of the sixth horizontal rod located at the right end of the front table board is fixed on the front table board by a tenth vertical lifting rod. The left end point of the sixth horizontal rod located at the left end of the rear table board is fixed on the rear table board by an eleventh vertical lifting rod. The right end point of the sixth horizontal rod located at the right end of the rear table board is fixed on the rear table board by a twelfth vertical lifting rod. The ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod are driven together by a third motor to ascend or descend.

The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring are respectively connected to a red ink cartridge, a yellow ink cartridge, and a blue ink cartridge by an ink channel. The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring have a same structure. The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring have an annular shape. The annular shape includes a first left annular surface and a first right annular surface. The bottom ends of the first left annular surface and the first right annular surface are connected by a first rotating shaft controlled by a motor. The top ends of the first left annular surface and the first right annular surface are not connected. An inner circular surface of the annular shape of each dyeing ring is a first rotating circular surface. When the first rotating shaft rotates to enable the top ends of the first left annular surface and the first right annular surface to tightly contact, a strand passes through the inner circular surface to move forward to drive the inner circular surface to rotate, so that red ink in the red dyeing ring, yellow ink in the yellow dyeing ring, and blue ink in the blue dyeing ring are emitted and sprayed on the strand.

A color fixing system is added at the front of the dyeing system. The color fixing system includes color fixing rings. The number of the color fixing rings is the same as that of the blue dyeing rings. The color fixing ring is located right in front of the blue dyeing ring. The bottom end of the color fixing ring is fixedly connected to a fourth vertical rod. The top end of the fourth vertical rod is fixedly connected to the color fixing ring. The bottom end of the fourth vertical rod is fixed on a seventh horizontal rod. The seventh horizontal rods on all the spindles of the front table board are integrally connected. The seventh horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the seventh horizontal rod located at the left end of the front table board is fixed on the front table board by a thirteenth vertical lifting rod. The right end point of the seventh horizontal rod located at the right end of the front table board is fixed on the front table board by a fourteenth vertical lifting rod. The left end point of the seventh horizontal rod located at the left end of the rear table board is fixed on the rear table board by a fifteenth vertical lifting rod. The right end point of the seventh horizontal rod located at the right end of the rear table board is fixed on the rear table board by a sixteenth vertical lifting rod. The thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod are driven together by a fourth motor to ascend or descend. The color fixing ring has an annular shape. The annular shape includes a second left annular surface and a second right annular surface. The bottom ends of the second left annular surface and the second right annular surface are connected by a second rotating shaft controlled by a motor. The top ends of the second left annular surface and the second right annular surface are not connected. An inner circular surface of the annular shape of the color fixing ring is a heating circular surface. When the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to close, the heating circular surface starts heating. When the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to be disengaged, the heating circular surface stops heating.

A bunching bell mouth device is added at the front of the dyeing system. The bunching bell mouth device includes a level-1 bell mouth, a level-2 bell mouth, and a level-3 bell mouth. The level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth are sequentially fixed, connected, and arranged from rear to front in the length direction of the bunching bell mouth. The diameter of the level-1 bell mouth is greater than the diameter of the level-2 bell mouth. The diameter of the level-2 bell mouth is greater than the diameter of the level-3 bell mouth. A delivery roller pair is added at the front of the bunching bell mouth. The delivery roller pair includes a bottom delivery roller and a top delivery rubber roller. The bottom delivery roller is a cylindrical solid steel or iron structure. The top delivery rubber roller includes a middle shaft and a rotating sleeve. The rotating sleeve is connected to the middle shaft by a bearing and is freely rotatable around the middle shaft. The middle shaft of the top delivery rubber roller of one spindle and the middle shaft of the top delivery rubber roller of an adjacent spindle thereof on the right side are integrally connected. The middle portion of the middle shafts of two spindles whose middle shafts are integrally connected is inserted in the independent gripper of the pressuring assembly to achieve connection of the top delivery rubber roller.

A production method for colored spun yarn with fiber dyeing and mixing in a spinning process. In use, the pressuring assembly presses downward, so that the rubber roller sleeve of the rear top rubber roller, the rubber roller sleeve of the middle top rubber roller, and the rubber roller sleeve of the front top rubber roller of each spindle are respectively tightly pressed to contact the roller sleeve of the rear bottom roller, the roller sleeve of the middle bottom roller, and the roller sleeve of the front bottom roller. Also, the bottom delivery roller and the rotating sleeve of the top delivery rubber roller are tightly pressed to contact. Also, in an initial state, it is set that all the red dyeing rings of the rear-row dyeing device, all the yellow dyeing rings of the middle-row dyeing device, and all the blue dyeing rings of the front-row dyeing device are all fully lowered and in an open state that the top ends are not connected, it is set that the first expandable holes, the second expandable holes, and the third expandable holes are all in a fully open state, and it is set that all the color fixing rings of the color fixing system are all fully lowered and in an open state that the top ends are not connected.

A roving enters the roving feeding bell mouth, is tightly pressed between the rubber roller sleeve of the rear top rubber roller and the roller sleeve of the rear bottom roller of the rear roller drafting pair, and is fed into a drafting area. The roving is then tightly pressed between the rubber roller sleeve of the middle top rubber roller and the roller sleeve of the middle bottom roller of the middle roller drafting pair and is delivered. A first strand with reduced linear density and reduced twist is obtained under a drafting effect of a rear drafting area between the rear roller drafting pair and the middle roller drafting pair. The first strand is then tightly pressed between the rubber roller sleeve of the front top rubber roller and the roller sleeve of the front bottom roller of the front roller drafting pair and is delivered. A second strand with reduced linear density and reduced twist is obtained under a drafting effect of a front drafting area between the middle roller drafting pair and the front roller drafting pair. The second strand is flat and fibers in the strand exist in a relatively loose state. The drafted second strand subsequently enters the splitting plate, keeps moving forward in the arc direction of the splitting plate, and sequentially passes through the level-1 splitting teeth, the level-2 splitting teeth, and the level-3 splitting teeth of the splitting plate, so that the second strand is divided into several uniform fiber bundles. As the arrangement density of the splitting teeth that the second strand passes through gradually increases, the number of fiber bundles into which the second strand is divided gradually increases. The eventually obtained number of fiber bundles is equal to the number of the splitting channels in the level-3 splitting teeth. Also, the linear density of each fiber bundle is calculated according to the linear density of the delivered second strand and the number of the splitting channels in the splitting teeth.

Each fiber bundle obtained then passes through the dyeing system. In this process, first, according to a required color of final spun colored spun yarn and the calculated linear density of each fiber bundle, a number of fiber bundles to be dyed red, a number of fiber bundles to be dyed yellow, and a number of fiber bundles to be dyed blue that are required to obtain the color are calculated.

The number of first expandable holes to be in a shrunk state starting from the leftmost side in each corresponding spindle is then set according to the calculated required number of fiber bundles to be dyed red. In this case, the first vertical rod and the second horizontal rod at the bottom end of the red dyeing ring at the position of the first expandable hole in a shrunk state are tightly connected. In this case, the position of a first expandable hole in a shrunk state on the rightmost side in each spindle is designated as a first position. The first motor then drives the first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod together to ascend together, so as to drive the second horizontal rod of the front table board and the second horizontal rod of the rear table board to ascend, so as to drive the red dyeing ring at the position of the first expandable hole in a shrunk state to ascend. When the ascended red dyeing ring is in a fully ascended state, the first motor stops working, and the fiber bundle at the corresponding position contacts the fully ascended red dyeing ring. The first rotating shaft of the fully ascended red dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the red dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the red dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the red dyeing ring to rotate, so that red ink in the red dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle red.

Also, the number of second expandable holes to be in a shrunk state starting from a next second expandable hole of the yellow dyeing ring parallel to the first position in each corresponding spindle is set according to the calculated required number of fiber bundles to be dyed yellow. In this case, the second vertical rod and the fourth horizontal rod of the bottom end of the yellow dyeing ring at the position of the second expandable hole in a shrunk state are tightly connected. In this case, the position of a second expandable hole in a shrunk state on the rightmost side in each spindle is designated as a second position. The second motor then drives the fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod together to ascend together, so as to drive the fourth horizontal rod of the front table board and the fourth horizontal rod of the rear table board to ascend, so as to drive the yellow dyeing ring at the position of the second expandable hole in a shrunk state to ascend. When the ascended yellow dyeing ring is in a fully ascended state, the second motor stops working, and the fiber bundle at the corresponding position contacts the fully ascended yellow dyeing ring. The first rotating shaft of the fully ascended yellow dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the yellow dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the yellow dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the yellow dyeing ring to rotate, so that yellow ink in the yellow dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle yellow;

Also, the number of third expandable holes to be in a shrunk state from a next third expandable hole of the blue dyeing ring parallel to the second position to the rightmost side in each corresponding spindle is set according to the calculated required number of fiber bundles to be dyed blue. In this case, the third vertical rod and the sixth horizontal rod of the bottom end of the blue dyeing ring at the position of the third expandable hole in a shrunk state are tightly connected. The third motor then drives the ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod together to ascend together, so as to drive the sixth horizontal rod of the front table board and the sixth horizontal rod of the rear table board to ascend, so as to drive the blue dyeing ring at the position of the third expandable hole in a shrunk state to ascend. When the ascended blue dyeing ring is in a fully ascended state, the third motor stops working, and the fiber bundle at the corresponding position contacts the fully ascended blue dyeing ring. The first rotating shaft of the fully ascended blue dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the blue dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the blue dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the blue dyeing ring to rotate, so that blue ink in the blue dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle blue.

All the fiber bundles that are dyed red or dyed yellow or dyed blue then simultaneously pass through the color fixing system. In this process, the fourth motor drives the thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod together to ascend together, so as to drive the seventh horizontal rod of the front table board and the seventh horizontal rod of the rear table board to ascend, so as to drive the fourth vertical rod to ascend to drive each color fixing ring to ascend. When the color fixing ring is in a fully ascended state, the fourth motor stops working, and the fiber bundle contacts the fully ascended color fixing ring. The second rotating shaft of the color fixing ring then rotates to enable the top ends of the second left annular surface and the second right annular surface of the color fixing ring to tightly contact, so that the heating circular surface of the color fixing ring starts heating. In this case, the fiber bundle passes through the inner circular surface of the color fixing ring, to achieve a color fixing process for the dyed fiber bundle, so that the dyed colors of the fiber bundles are fixed.

The dyed and color-fixed fiber bundles are fixed subsequently enter the bunching bell mouth, keeps moving forward in the length direction of the bunching bell mouth, and sequentially passes through the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth of the bunching bell mouth, so that the dyed and color-fixed fiber bundles keep gathering. As the diameter of the bell mouth through which the fiber bundles pass gradually reduces, the fiber bundles are gathered increasingly tightly, so that during the gathering, as the mechanical pressing force applied by the bell mouth to the fiber bundles increases, the fiber bundles are pressed towards each other, mixed, and transferred in parallel to achieve parallel transfer and mixing of various fiber bundles with different colors. A compacted mixed strand with extremely weak twist is eventually obtained. Finally, the mixed strand is tightly pressed between the bottom delivery roller and the top delivery rubber roller of the delivery roller pair, so that the mixed strand is continuously delivered forward as the delivery roller pair keeps rotating and driving. The delivered mixed strand is twisted with a number of twists by the ring spinning machine. During the twisting, the fibers in the mixed strand keep transferring inwardly and outwardly with a number of twists, thereby achieving inward and outward transfer and mixing of various fibers with different colors, to obtain final mixed colored spun yarn.

According to the production apparatus and production method for colored spun yarn with fiber dyeing and mixing in a spinning process provided in the present invention, a single white roving is directly fed in a spinning process. The fed roving is drafted to obtain a fiber bundle with weak twist or no twist. The fiber bundle then passes through three gradually denser levels of splitting teeth to achieve splitting of fibers in the fiber bundle. The split fiber strands are dyed by controllable red, yellow, and blue ink cartridges. The ink cartridges with three colors are controlled by a lifting system to ascend or descend, so that selected proportions and numbers of fiber strands are dyed red, yellow, and blue according to a required color of final colored spun yarn. The dyed strands are gathered by three levels of bunching bell mouths with gradually decreasing diameters. The gathered fiber bundles are driven by the delivery roller pair and continuously delivered, and finally are twisted into yarn, so as to produce colored spun yarn with any color. By sequentially adding a dyeing system and a color fixing system at the front of a drafting system of a ring spinning machine, the present invention enables a fiber dyeing process and a color mixing process required in the production of colored spun yarn to be simultaneously completed in a spinning process, thereby greatly improving the production efficiency of colored spun yarn.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGURE is a schematic structural diagram of a production apparatus for colored spun yarn with fiber dyeing and mixing in a spinning process according to the present invention.

In the FIGURE: 1. roving feeding bell mouth; 2. roving; 3. rear top rubber roller; 4. rear bottom roller; 5. middle top rubber roller; 6. middle bottom roller; 7. front top rubber roller; 8. front bottom roller; 9. top delivery rubber roller; 10. bottom delivery roller; 11. roller shaft; 12. rubber roller shaft; 13. rubber roller sleeve; 14. roller sleeve; 15. splitting plate; 16. splitting tooth; 17. dyeing system; 18. color fixing system; 19. bunching bell mouth; 20. middle shaft; and 21. rotating sleeve.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present invention is further described below with reference to the accompanying drawings. As shown in FIGURE, a production apparatus for colored spun yarn with fiber dyeing and mixing in a spinning process uses a ring spinning machine for spinning. The ring spinning machine is formed by 420 spindles or 516 spindles or 1028 spindles with an identical structure. Each spindle includes a drafting system. The ring spinning machine includes a front table board and a rear table board. The front table board and the rear table board have an identical structure. Each of the front table board and the rear table board is formed by 210 spindles or 258 spindles or 524 spindles with an identical structure. The drafting system includes a rear roller drafting pair formed by a rear bottom roller 4 and a rear top rubber roller 3, a middle roller drafting pair formed by a middle bottom roller 6 and a middle top rubber roller 5, and a front roller drafting pair formed by a front bottom roller 8 and a front top rubber roller 7. A roving feeding bell mouth 1 is arranged at the rear of the rear roller drafting pair. The rear bottom roller 4, the middle bottom roller 6, and the front bottom roller 8 have a same structure. The rear bottom roller 4, the middle bottom roller 6, and the front bottom roller 8 are arranged from rear to front in a straight line at 45 degrees from a horizontal transverse line. Each of the rear bottom roller 4, the middle bottom roller 6, and the front bottom roller 8 includes a roller shaft 11. The roller shaft 11 is a solid cylindrical iron or steel structure. For all the spindles of the front table board, the roller shafts 11 of the rear bottom rollers 4 are integrally connected, the roller shafts 11 of the middle bottom rollers 6 are integrally connected, and the roller shafts 11 of the front bottom rollers 8 are integrally connected. For all the spindles of the rear table board, the roller shafts 11 of the rear bottom rollers 4 are integrally connected, the roller shafts 11 of the middle bottom rollers 6 are integrally connected, and the roller shafts 11 of the front bottom rollers 8 are integrally connected. The roller shaft 11 is integrally sleeved with a roller sleeve 14. The material of the roller sleeve 14 is the same as that of the roller shaft 11. The roller sleeve 14 of each spindle is independent. The rear top rubber roller 3, the middle top rubber roller 5, and the front top rubber roller 7 have a same structure. Each of the rear top rubber roller 3, the middle top rubber roller 5, and the front top rubber roller 7 includes a rubber roller shaft 12. The rubber roller shaft 12 is a solid cylindrical iron or steel structure. For one spindle, the rubber roller shaft 12 of the rear top rubber roller 3 and the rubber roller shaft 12 of the rear top rubber roller 3 of an adjacent spindle thereof on the right side are integrally connected, the rubber roller shaft 12 of the middle top rubber roller 5 and the rubber roller shaft 12 of the middle top rubber roller 5 of the adjacent spindle thereof on the right side are integrally connected, and the rubber roller shaft 12 of the front top rubber roller 7 and the rubber roller shaft 12 of the front top rubber roller 7 of the adjacent spindle thereof on the right side are integrally connected. The rubber roller shaft 12 is connected to a rubber roller sleeve 13 by a bearing. The rubber roller sleeve 13 is made of a rubber material. A middle portion of the rubber roller shafts 12 of two spindles whose rubber roller shafts 12 are integrally connected is inserted in an independent gripper of a pressuring assembly to achieve connection of the rear top rubber roller 3, the middle top rubber roller 5, and the front top rubber roller 7.

A splitting plate 15 is arranged at the front of the front roller drafting pair. The splitting plate 15 is an arc-shaped structure. The splitting plates 15 of all the spindles of the front table board are integrally connected. The splitting plates 15 of all the spindles of the rear table board are integrally connected. The left and right ends of the splitting plate 15 are fixed at the front table board or the rear table board. The arc of the splitting plate 15 is ¼ of the circumference. Splitting teeth 16 are provided in the arc direction of the splitting plate 15 on each spindle. The splitting teeth 16 include level-1 splitting teeth, level-2 splitting teeth, and level-3 splitting teeth. The level-1 splitting teeth, the level-2 splitting teeth, and the level-3 splitting teeth are sequentially connected and arranged from rear to front in the arc direction of the splitting plate 15. The arrangement density of the level-1 splitting teeth is less than the arrangement density of the level-2 splitting teeth. The arrangement density of the level-2 splitting teeth is less than the arrangement density of the level-3 splitting teeth. The rear ends of the level-1 splitting teeth are located at the rearmost end in the arc direction of the splitting plate 15. The front ends of the level-3 splitting teeth are located at the frontmost end in the arc direction of the splitting plate 15. A dyeing system 17 is arranged at the front of the splitting plate 15 of each spindle. The dyeing system 17 includes a rear-row dyeing device, a middle-row dyeing device, and a front-row dyeing device. The rear-row dyeing device, the middle-row dyeing device, and the front-row dyeing device are arranged in parallel in the front-rear direction.

The rear-row dyeing device includes red dyeing rings. The number of the red dyeing rings is the same as that of splitting channels in the level-3 splitting teeth. The red dyeing ring is located right in front of the splitting channel in the level-3 splitting teeth. A first vertical rod is fixedly connected at the bottom end of the red dyeing ring. The top end of the first vertical rod is fixedly connected to the red dyeing ring. The bottom end of the first vertical rod is movably inserted in a first horizontal rod. Grooves are provided in the first horizontal rod at equal intervals. The number of the grooves is the same as that of the first vertical rods. The bottom end of the first vertical rod is movably inserted in the groove in the first horizontal rod to support the first vertical rod. The first horizontal rods on all the spindles of the front table board are integrally connected. The first horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the first horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the first horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board. A second horizontal rod is arranged above the first horizontal rod. First expandable holes are provided in the second horizontal rod at equal intervals. The first expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the first expandable holes is the same as that of the red dyeing rings. The first vertical rod at the bottom end of each red dyeing ring passes through the first expandable hole. The first horizontal rods on all the spindles of the front table board are integrally connected. The first horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the first horizontal rod located at the left end of the front table board is fixed on the front table board by a first vertical lifting rod. The right end point of the first horizontal rod located at the right end of the front table board is fixed on the front table board by a second vertical lifting rod. The left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board by a third vertical lifting rod. The right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board by a fourth vertical lifting rod. The first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod are driven together by a first motor to ascend or descend.

The middle-row dyeing device includes yellow dyeing rings. The number of the yellow dyeing rings is the same as that of the red dyeing rings. The yellow dyeing ring is located right in front of the red dyeing ring. The bottom end of the yellow dyeing ring is fixedly connected to a second vertical rod. The top end of the second vertical rod is fixedly connected to the yellow dyeing ring. The bottom end of the second vertical rod is movably inserted in a third horizontal rod. Grooves are provided in the third horizontal rod at equal intervals. The number of the grooves is the same as that of the second vertical rods. The bottom end of the second vertical rod is movably inserted in the groove in the third horizontal rod to support the second vertical rod. The third horizontal rods on all the spindles of the front table board are integrally connected. The third horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the third horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the third horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the third horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board. A fourth horizontal rod is arranged above the third horizontal rod. Second expandable holes are provided in the fourth horizontal rod at equal intervals. The second expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the second expandable holes is the same as that of the yellow dyeing rings. The second vertical rod at the bottom end of each yellow dyeing ring passes through the second expandable hole. The fourth horizontal rods on all the spindles of the front table board are integrally connected. The fourth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the fourth horizontal rod located at the left end of the front table board is fixed on the front table board by a fifth vertical lifting rod. The right end point of the fourth horizontal rod located at the right end of the front table board is fixed on the front table board by a sixth vertical lifting rod. The left end point of the fourth horizontal rod located at the left end of the rear table board is fixed on the rear table board by a seventh vertical lifting rod. The right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board by an eighth vertical lifting rod. The fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod are driven together by a second motor to ascend or descend.

The front-row dyeing device includes blue dyeing rings. The number of the blue dyeing rings is the same as that of the yellow dyeing rings. The blue dyeing ring is located right in front of the yellow dyeing ring. The bottom end of the blue dyeing ring is fixedly connected to a third vertical rod. The top end of the third vertical rod is fixedly connected to the blue dyeing ring. The bottom end of the third vertical rod is movably inserted in a fifth horizontal rod. Grooves are provided in the fifth horizontal rod at equal intervals. The number of the grooves is the same as that of the third vertical rods. The bottom end of the third vertical rod is movably inserted in the groove in the fifth horizontal rod to support the third vertical rod. The fifth horizontal rods on all the spindles of the front table board are integrally connected. The fifth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the fifth horizontal rod located at the left end of the front table board is fixed on the front table board. The right end point of the fifth horizontal rod located at the right end of the front table board is fixed on the front table board. The left end point of the fifth horizontal rod located at the left end of the rear table board is fixed on the rear table board. The right end point of the fifth horizontal rod located at the right end of the rear table board is fixed on the rear table board. A sixth horizontal rod is arranged above the fifth horizontal rod. Third expandable holes are provided in the sixth horizontal rod at equal intervals. The third expandable hole at the same position in each spindle is controlled by a separate motor to expand or shrink. The number of the third expandable holes is the same as that of the blue dyeing rings. The third vertical rod at the bottom end of each blue dyeing ring passes through the third expandable hole. The sixth horizontal rods on all the spindles of the front table board are integrally connected. The sixth horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the sixth horizontal rod located at the left end of the front table board is fixed on the front table board by a ninth vertical lifting rod. The right end point of the sixth horizontal rod located at the right end of the front table board is fixed on the front table board by a tenth vertical lifting rod. The left end point of the sixth horizontal rod located at the left end of the rear table board is fixed on the rear table board by an eleventh vertical lifting rod. The right end point of the sixth horizontal rod located at the right end of the rear table board is fixed on the rear table board by a twelfth vertical lifting rod. The ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod are driven together by a third motor to ascend or descend.

The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring are respectively connected to a red ink cartridge, a yellow ink cartridge, and a blue ink cartridge by an ink channel. The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring have a same structure. The red dyeing ring, the yellow dyeing ring, and the blue dyeing ring have an annular shape. The annular shape includes a first left annular surface and a first right annular surface. The bottom ends of the first left annular surface and the first right annular surface are connected by a first rotating shaft controlled by a motor. The top ends of the first left annular surface and the first right annular surface are not connected. An inner circular surface of the annular shape of each dyeing ring is a first rotating circular surface. When the first rotating shaft rotates to enable the top ends of the first left annular surface and the first right annular surface to tightly contact, a strand passes through the inner circular surface to move forward to drive the inner circular surface to rotate, so that red ink in the red dyeing ring, yellow ink in the yellow dyeing ring, and blue ink in the blue dyeing ring are emitted and sprayed on the strand.

A color fixing system 18 is added at the front of the dyeing system 17. The color fixing system 18 includes color fixing rings. The number of the color fixing rings is the same as that of the blue dyeing rings. The color fixing ring is located right in front of the blue dyeing ring. The bottom end of the color fixing ring is fixedly connected to a fourth vertical rod. The top end of the fourth vertical rod is fixedly connected to the color fixing ring. The bottom end of the fourth vertical rod is fixed on a seventh horizontal rod. The seventh horizontal rods on all the spindles of the front table board are integrally connected. The seventh horizontal rods on all the spindles of the rear table board are integrally connected. The left end point of the seventh horizontal rod located at the left end of the front table board is fixed on the front table board by a thirteenth vertical lifting rod. The right end point of the seventh horizontal rod located at the right end of the front table board is fixed on the front table board by a fourteenth vertical lifting rod. The left end point of the seventh horizontal rod located at the left end of the rear table board is fixed on the rear table board by a fifteenth vertical lifting rod. The right end point of the seventh horizontal rod located at the right end of the rear table board is fixed on the rear table board by a sixteenth vertical lifting rod. The thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod are driven together by a fourth motor to ascend or descend. The color fixing ring has an annular shape. The annular shape includes a second left annular surface and a second right annular surface. The bottom ends of the second left annular surface and the second right annular surface are connected by a second rotating shaft controlled by a motor. The top ends of the second left annular surface and the second right annular surface are not connected. An inner circular surface of the annular shape of the color fixing ring is a heating circular surface. When the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to close, the heating circular surface starts heating. When the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to be disengaged, the heating circular surface stops heating.

A bunching bell mouth 19 device is added at the front of the dyeing system 17. The bunching bell mouth 19 device includes a level-1 bell mouth, a level-2 bell mouth, and a level-3 bell mouth. The level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth are sequentially fixed, connected, and arranged from rear to front in the length direction of the bunching bell mouth 19. The diameter of the level-1 bell mouth is greater than the diameter of the level-2 bell mouth. The diameter of the level-2 bell mouth is greater than the diameter of the level-3 bell mouth. A delivery roller pair is added at the front of the bunching bell mouth 19. The delivery roller pair includes a bottom delivery roller 10 and a top delivery rubber roller 9. The bottom delivery roller 10 is a cylindrical solid steel or iron structure. The top delivery rubber roller 9 includes a middle shaft 20 and a rotating sleeve 21. The rotating sleeve 21 is connected to the middle shaft 20 by a bearing and is freely rotatable around the middle shaft 20. The middle shaft 20 of the top delivery rubber roller 9 of one spindle and the middle shaft 20 of the top delivery rubber roller 9 of an adjacent spindle thereof on the right side are integrally connected. The middle portion of the middle shafts 20 of two spindles whose middle shafts 20 are integrally connected is inserted in the independent gripper of the pressuring assembly to achieve connection of the top delivery rubber roller 9.

The present invention further relates to a production method for colored spun yarn with fiber dyeing and mixing in a spinning process. In use, the pressuring assembly presses downward, so that the rubber roller sleeve 13 of the rear top rubber roller 3, the rubber roller sleeve 13 of the middle top rubber roller 5, and the rubber roller sleeve 13 of the front top rubber roller 7 of each spindle are respectively tightly pressed to contact the roller sleeve 14 of the rear bottom roller 4, the roller sleeve 14 of the middle bottom roller 6, and the roller sleeve 14 of the front bottom roller 8. Also, the bottom delivery roller 10 and the rotating sleeve 21 of the top delivery rubber roller 9 are tightly pressed to contact. Also, in an initial state, it is set that all the red dyeing rings of the rear-row dyeing device, all the yellow dyeing rings of the middle-row dyeing device, and all the blue dyeing rings of the front-row dyeing device are all fully lowered and in an open state that the top ends are not connected, it is set that the first expandable holes, the second expandable holes, and the third expandable holes are all in a fully open state, and it is set that all the color fixing rings of the color fixing system 18 are all fully lowered and in an open state that the top ends are not connected.

A roving enters the roving feeding bell mouth 1, is tightly pressed between the rubber roller sleeve 13 of the rear top rubber roller 3 and the roller sleeve 14 of the rear bottom roller 4 of the rear roller drafting pair, and is fed into a drawing area. The roving is then tightly pressed between the rubber roller sleeve 13 of the middle top rubber roller 5 and the roller sleeve 14 of the middle bottom roller 6 of the middle roller drafting pair and is delivered. A first strand with reduced linear density and reduced twist is obtained under a drafting effect of a rear drafting area between the rear roller drafting pair and the middle roller drafting pair. The first strand is then tightly pressed between the rubber roller sleeve 13 of the front top rubber roller 7 and the roller sleeve 14 of the front bottom roller 8 of the front roller drafting pair and is delivered. A second strand with reduced linear density and reduced twist is obtained under a drafting effect of a front drafting area between the middle roller drafting pair and the front roller drafting pair. The second strand is flat and fibers in the strand exist in a relatively loose state. The drafted second strand subsequently enters the splitting plate 15, keeps moving forward in the arc direction of the splitting plate 15, and sequentially passes through the level-1 splitting teeth, the level-2 splitting teeth, and the level-3 splitting teeth of the splitting plate 15, so that the second strand is divided into several uniform fiber bundles. As the arrangement density of the splitting teeth 16 that the second strand passes through gradually increases, the number of fiber bundles into which the second strand is divided gradually increases. The eventually obtained number of fiber bundles is equal to the number of the splitting channels in the level-3 splitting teeth. Also, the linear density of each fiber bundle is calculated according to the linear density of the delivered second strand and the number of the splitting channels in the splitting teeth 16. Each fiber bundle obtained then passes through the dyeing system 17. In this process, first, according to a required color of final spun colored spun yarn and the calculated linear density of each fiber bundle, a number of fiber bundles to be dyed red, a number of fiber bundles to be dyed yellow, and a number of fiber bundles to be dyed blue that are required to obtain the color are calculated.

The number of first expandable holes to be in a shrunk state starting from the leftmost side in each corresponding spindle is then set according to the calculated required number of fiber bundles to be dyed red. In this case, the first vertical rod and the second horizontal rod at the bottom end of the red dyeing ring at the position of the first expandable hole in a shrunk state are tightly connected. In this case, the position of a first expandable hole in a shrunk state on the rightmost side in each spindle is designated as a first position. The first motor then drives the first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod together to ascend together, so as to drive the second horizontal rod of the front table board and the second horizontal rod of the rear table board to ascend, so as to drive the red dyeing ring at the position of the first expandable hole in a shrunk state to ascend. When the ascended red dyeing ring is in a fully ascended state, the first motor stops working, and the fiber bundle at the corresponding position contacts the fully ascended red dyeing ring. The first rotating shaft of the fully ascended red dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the red dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the red dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the red dyeing ring to rotate, so that red ink in the red dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle red.

Also, the number of second expandable holes to be in a shrunk state starting from a next second expandable hole of the yellow dyeing ring parallel to the first position in each corresponding spindle is set according to the calculated required number of fiber bundles to be dyed yellow. In this case, the second vertical rod and the fourth horizontal rod of the bottom end of the yellow dyeing ring at the position of the second expandable hole in a shrunk state are tightly connected. In this case, the position of a second expandable hole in a shrunk state on the rightmost side in each spindle is designated as a second position. The second motor then drives the fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod together to ascend together, so as to drive the fourth horizontal rod of the front table board and the fourth horizontal rod of the rear table board to ascend, so as to drive the yellow dyeing ring at the position of the second expandable hole in a shrunk state to ascend. When the ascended yellow dyeing ring is in a fully ascended state, the second motor stops working, and the fiber bundle at the corresponding position contacts the fully ascended yellow dyeing ring. The first rotating shaft of the fully ascended yellow dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the yellow dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the yellow dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the yellow dyeing ring to rotate, so that yellow ink in the yellow dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle yellow.

Also, the number of third expandable holes to be in a shrunk state from a next third expandable hole of the blue dyeing ring parallel to the second position to the rightmost side in each corresponding spindle is set according to the calculated required number of fiber bundles to be dyed blue. In this case, the third vertical rod and the sixth horizontal rod of the bottom end of the blue dyeing ring at the position of the third expandable hole in a shrunk state are tightly connected. The third motor then drives the ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod together to ascend together, so as to drive the sixth horizontal rod of the front table board and the sixth horizontal rod of the rear table board to ascend, so as to drive the blue dyeing ring at the position of the third expandable hole in a shrunk state to ascend. When the ascended blue dyeing ring is in a fully ascended state, the third motor stops working, the fiber bundle at the corresponding position contacts the fully ascended blue dyeing ring. The first rotating shaft of the fully ascended blue dyeing ring then rotates to enable the top ends of the first left annular surface and the first right annular surface of the blue dyeing ring to tightly contact. In this case, the fiber bundle passes through the inner circular surface of the blue dyeing ring. The fiber bundle moves forward to drive the inner circular surface of the blue dyeing ring to rotate, so that blue ink in the blue dyeing ring is emitted and sprayed on the corresponding fiber bundle to dye the fiber bundle blue.

All the fiber bundles that are dyed red or dyed yellow or dyed blue then simultaneously pass through the color fixing system 18. In this process, the fourth motor drives the thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod together to ascend together, so as to drive the seventh horizontal rod of the front table board and the seventh horizontal rod of the rear table board to ascend, so as to drive the fourth vertical rod to ascend to drive each color fixing ring to ascend. When the color fixing ring is in a fully ascended state, the fourth motor stops working, and the fiber bundle contacts the fully ascended color fixing ring. The second rotating shaft of the color fixing ring then rotates to enable the top ends of the second left annular surface and the second right annular surface of the color fixing ring to tightly contact, so that the heating circular surface of the color fixing ring starts heating. In this case, the fiber bundle passes through the inner circular surface of the color fixing ring to achieve a color fixing process for the dyed fiber bundle, so that the dyed colors of the fiber bundles are fixed.

The dyed and color-fixed fiber bundles subsequently enter the bunching bell mouth 19, keep moving forward in the length direction of the bunching bell mouth 19, and sequentially pass through the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth of the bunching bell mouth 19, so that the dyed and color-fixed fiber bundles keep gathering. As the diameter of the bell mouth through which the fiber bundles pass gradually reduces, the fiber bundles are gathered increasingly tightly, so that during the gathering, as the mechanical pressing force applied by the bell mouth to the fiber bundles increases, the fiber bundles are pressed towards each other, mixed, and transferred in parallel to achieve parallel transfer and mixing of various fiber bundles with different colors. A compacted mixed strand with extremely weak twist is eventually obtained. Finally, the mixed strand is tightly pressed between the bottom delivery roller 10 and the top delivery rubber roller 9 of the delivery roller pair, so that the mixed strand is continuously delivered forward as the delivery roller pair keeps rotating and driving. The delivered mixed strand is twisted with a number of twists by the ring spinning machine. During the twisting, the fibers in the mixed strand keep transferring inwardly and outwardly with a number of twists, thereby achieving inward and outward transfer and mixing of various fibers with different colors, to obtain final mixed colored spun yarn. 

What is claimed is:
 1. A production apparatus for colored spun yarn with fiber dyeing and mixing in a spinning process, the production apparatus being a ring spinning machine, wherein the ring spinning machine comprises a front table board and a rear table board, and the front table board and the rear table board have a same structure, each of the front table board and the rear table board is formed by a plurality of spindles with a same structure, and each spindle of the plurality of spindles comprises a drafting system; a roving feeding bell mouth is connected at a rear of the drafting system, a splitting plate is arranged at a front of the drafting system, a dyeing system is arranged at a front of the splitting plate, a color fixing system is added at a front of the dyeing system, and a bunching bell mouth device and a delivery roller pair are arranged at a front of the color fixing system.
 2. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, wherein the drafting system comprises a rear roller drafting pair formed by a rear bottom roller and a rear top rubber roller, a middle roller drafting pair formed by a middle bottom roller and a middle top rubber roller, and a front roller drafting pair formed by a front bottom roller and a front top rubber roller, wherein the rear roller drafting pair, the middle roller drafting pair and the front roller drafting pair are sequentially arranged; the roving feeding bell mouth is arranged at a rear of the rear roller drafting pair, and the splitting plate is arranged at a front of the front roller drafting pair.
 3. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 2, wherein the rear bottom roller, the middle bottom roller, and the front bottom roller have a same structure, and the rear bottom roller, the middle bottom roller and the front bottom roller are arranged from rear to front in a straight line at 45 degrees from a horizontal transverse line; each of the rear bottom roller, the middle bottom roller and the front bottom roller comprises a roller shaft, and the roller shaft is a solid cylindrical iron or steel structure; in the plurality of spindles of the front table board and the rear table board, the roller shafts of the rear bottom rollers are integrally connected, the roller shafts of the middle bottom rollers are integrally connected, and the roller shafts of the front bottom rollers are integrally connected; the roller shaft is integrally sleeved with a roller sleeve, a material of the roller sleeve is the same as a material of the roller shaft, and the roller sleeve of the each spindle is independent; the rear top rubber roller, the middle top rubber roller and the front top rubber roller have a same structure; each of the rear top rubber roller, the middle top rubber roller and the front top rubber roller comprises a rubber roller shaft, and the rubber roller shaft is a solid cylindrical iron or steel structure; wherein, a rubber roller shaft of a rear top rubber roller of a first spindle and a rubber roller shaft of a rear top rubber roller of a second spindle are integrally connected, a rubber roller shaft of a middle top rubber roller of the first spindle and a rubber roller shaft of a middle top rubber roller of the second spindle are integrally connected a rubber roller shaft of a front top rubber roller of the first spindle and a rubber roller shaft of a front top rubber roller of the second spindle are integrally connected, and the second spindle is adjacent to and on the right side of the first spindle; the rubber roller shaft is connected to a rubber roller sleeve by a bearing, and the rubber roller sleeve is made of a rubber material; and middle portions of rubber roller shafts of the first spindle and rubber roller shafts of the second spindle are inserted in an independent gripper of a pressuring assembly to achieve connections of the rear top rubber roller, the middle top rubber roller and the front top rubber roller.
 4. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, wherein the splitting plate is an arc-shaped structure of ¼ of a circumference; splitting plates of the plurality of spindles of the front table board and the rear table board are integrally connected; a left end and a right end of the splitting plate are fixed at the front table board or the rear table board; splitting teeth are provided in an arc direction of the splitting plate on the each spindle; the splitting teeth comprises level-1 splitting teeth, level-2 splitting teeth, and level-3 splitting teeth, wherein the level-1 splitting teeth, the level-2 splitting teeth and the level-3 splitting teeth are sequentially connected and arranged from rear to front in the arc direction of the splitting plate; an arrangement density of the level-1 splitting teeth is less than an arrangement density of the level-2 splitting teeth, the arrangement density of the level-2 splitting teeth is less than an arrangement density of the level-3 splitting teeth; the rear ends of the level-1 splitting teeth are located at a rearmost end in the arc direction of the splitting plate, and front ends of the level-3 splitting teeth are located at a frontmost end in the arc direction of the splitting plate.
 5. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, wherein the dyeing system is arranged at the front of the splitting plate of the each spindle, the dyeing system comprises a rear-row dyeing device, a middle-row dyeing device, and a front-row dyeing device, and the rear-row dyeing device, the middle-row dyeing device, and the front-row dyeing device are arranged in parallel in the front-rear direction.
 6. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 5, wherein the rear-row dyeing device comprises red dyeing rings, a number of the red dyeing rings is the same as a number of splitting channels in the level-3 splitting teeth, and the red dyeing rings are located right in front of the splitting channels in the level-3 splitting teeth; the middle-row dyeing device comprises yellow dyeing rings, a number of the yellow dyeing rings is the same as the number of the red dyeing rings, and the yellow dyeing rings are located right in front of the red dyeing rings; the front-row dyeing device comprises blue dyeing rings, a number of the blue dyeing rings is the same as the number of the red dyeing rings, and the blue dyeing rings are located right in front of the red dyeing rings; the red dyeing rings are connected to a red ink cartridge by an ink channel, the yellow dyeing rings are connected to a yellow ink cartridge by an ink channel, and the blue dyeing rings are connected to a blue ink cartridge by an ink channel; the red dyeing rings, the yellow dyeing rings, and the blue dyeing rings have same structure of an annular shape; the annular shape comprises a first left annular surface and a first right annular surface, a bottom end of the first left annular surface and a bottom end of the first right annular surface are connected by a first rotating shaft controlled by a motor, a top end of the first left annular surface and a top end of the first right annular surface are not connected; an inner circular surface of the annular shape of each dyeing ring is a first rotating circular surface, and when the first rotating shaft rotates to enable the top end of the first left annular surface and the top end of the first right annular surface to tightly contact, a strand passes through the inner circular surface to move forward to drive the inner circular surface to rotate, and red ink in the red dyeing rings, yellow ink in the yellow dyeing rings, and blue ink in the blue dyeing rings are emitted and sprayed on the strand.
 7. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 5, wherein the rear-row dyeing device comprises red dyeing rings, a first vertical rod is fixedly connected at a bottom end of the red dyeing ring, a top end of the first vertical rod is fixedly connected to the red dyeing ring, a bottom end of the first vertical rod is movably inserted in a first horizontal rod; grooves are provided in the first horizontal rod at equal intervals, a number of the grooves is the same as a number of the first vertical rods, the bottom end of the first vertical rod is movably inserted in the groove in the first horizontal rod to support the first vertical rod; first horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the first horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board; a second horizontal rod is arranged above the first horizontal rod; first expandable holes are provided in the second horizontal rod at equal intervals, the first expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the first expandable holes is the same as a number of the red dyeing rings; the first vertical rod at the bottom end of the each red dyeing ring passes through the first expandable hole, the first horizontal rods on the plurality of spindles of the front table board are integrally connected, the first horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the first horizontal rod located at a left end of the front table board is fixed on the front table board by a first vertical lifting rod, a right end point of the first horizontal rod located at a right end of the front table board is fixed on the front table board by a second vertical lifting rod, the left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board by a third vertical lifting rod, the right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board by a fourth vertical lifting rod, and the first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod are driven together by a first motor to ascend or descend; the middle-row dyeing device comprises yellow the dyeing rings, a bottom end of the yellow dyeing rings is fixedly connected to a second vertical rod, a top end of the second vertical rod is fixedly connected to the yellow dyeing ring, a bottom end of the second vertical rod is movably inserted in a third horizontal rod; grooves are provided in the third horizontal rod at equal intervals, a number of the grooves is the same as a number of the second vertical rods, the bottom end of the second vertical rod is movably inserted in the groove in the third horizontal rod to support the second vertical rod; the third horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the third horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a fourth horizontal rod is arranged above the third horizontal rod, second expandable holes are provided in the fourth horizontal rod at equal intervals, the second expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the second expandable holes is the same as a number of the yellow dyeing rings; the second vertical rod at the bottom end of the each yellow dyeing ring passes through the second expandable hole, the fourth horizontal rods on the plurality of spindles of the front table board are integrally connected, the fourth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the fourth horizontal rod located at the left end of the front table board is fixed on the front table board by a fifth vertical lifting rod, a right end point of the fourth horizontal rod located at the right end of the front table board is fixed on the front table board by a sixth vertical lifting rod, the left end point of the fourth horizontal rod located at the left end of the rear table board is fixed on the rear table board by a seventh vertical lifting rod, the right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board by an eighth vertical lifting rod, and the fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod are driven together by a second motor to ascend or descend; and the front-row dyeing device comprises the blue dyeing rings, the bottom end of the blue dyeing rings is fixedly connected to a third vertical rod, the top end of the third vertical rod is fixedly connected to the blue dyeing ring, the bottom end of the third vertical rod is movably inserted in a fifth horizontal rod; grooves are provided in the fifth horizontal rod at equal intervals, a number of the grooves is the same as a number of the third vertical rods, the bottom end of the third vertical rod is movably inserted in the groove in the fifth horizontal rod to support the third vertical rod; the fifth horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the fifth horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a sixth horizontal rod is arranged above the fifth horizontal rod, third expandable holes are provided in the sixth horizontal rod at equal intervals, the third expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the third expandable holes is the same as a number of the blue dyeing rings; the third vertical rod at the bottom end of the each blue dyeing ring passes through the third expandable hole, the sixth horizontal rods on the plurality of spindles of the front table board are integrally connected, the sixth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the sixth horizontal rod located at the left end of the front table board is fixed on the front table board by a ninth vertical lifting rod, a right end point of the sixth horizontal rod located at the right end of the front table board is fixed on the front table board by a tenth vertical lifting rod, the left end point of the sixth horizontal rod located at the left end of the rear table board is fixed on the rear table board by an eleventh vertical lifting rod, the right end point of the sixth horizontal rod located at the right end of the rear table board is fixed on the rear table board by a twelfth vertical lifting rod, and the ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod are driven together by a third motor to ascend or descend.
 8. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, wherein the color fixing system comprises color fixing rings, a number of the color fixing rings is the same as a number of the blue dyeing ring; the color fixing rings are located right in front of the blue dyeing ring; a bottom end of the color fixing ring is fixedly connected to a fourth vertical rod, a top end of the fourth vertical rod is fixedly connected to the color fixing ring, a bottom end of the fourth vertical rod is fixed on a seventh horizontal rod, the seventh horizontal rods on the plurality of spindles of the front table board are integrally connected, the seventh horizontal rods on the plurality of spindles of the rear table board are integrally connected; a left end point of the seventh horizontal rod located at the left end of the front table board is fixed on the front table board by a thirteenth vertical lifting rod, a right end point of the seventh horizontal rod located at the right end of the front table board is fixed on the front table board by a fourteenth vertical lifting rod, the left end point of the seventh horizontal rod located at the left end of the rear table board is fixed on the rear table board by a fifteenth vertical lifting rod; the right end point of the seventh horizontal rod located at the right end of the rear table board is fixed on the rear table board by a sixteenth vertical lifting rod; the thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod are driven together by a fourth motor to ascend or descend; the color fixing ring has an annular shape, the annular shape comprises a second left annular surface and a second right annular surface, a bottom end of the second left annular surface and a bottom end of the second right annular surface are connected by a second rotating shaft controlled by a motor, a top end of the second left annular surface and a top end of the second right annular surface are not connected; an inner circular surface of the annular shape of the color fixing ring is a heating circular surface, when the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to close, the heating circular surface starts heating, and when the second rotating shaft rotates to enable the top end of the second left annular surface and the top end of the second right annular surface to be disengaged, the heating circular surface stops heating.
 9. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, wherein the bunching bell mouth device comprises a level-1 bell mouth, a level-2 bell mouth, and a level-3 bell mouth; the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth are sequentially fixed, connected, and arranged from rear to front in a length direction of the bunching bell mouth; the diameters of the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth gradually decreases, and the delivery roller pair is added at a front of the bunching bell mouth.
 10. A production method for colored spun yarn with fiber dyeing and mixing in a spinning process using the production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 1, comprising the following steps: during spinning, pressing the pressuring assembly downward, wherein the rubber roller sleeves and the roller sleeves of the roller drafting pair of each spindle are tightly pressed to contact, and the bottom delivery roller and the rotating sleeve of the top delivery rubber roller are tightly pressed to contact, all dyeing rings of the dyeing system are all fully lowered and in an open state that the top ends are not connected, each expandable hole is in a fully open state, and all the color fixing rings of the color fixing system are all fully lowered and in an open state that the top ends are not connected; after a roving enters the roving feeding bell mouth, tightly pressing the roving by the rear roller drafting pair, and feeding the roving into a drafting area, tightly pressing and delivering the roving by the middle roller drafting pair, wherein a first strand with reduced linear density and reduced twist is obtained under a drafting effect of a rear drafting area between the rear roller drafting pair and the middle roller drafting pair; tightly pressing and delivering the first strand by the front roller drafting pair, wherein a second strand with reduced linear density and reduced twist is obtained under a drafting effect of a front drafting area between the middle roller drafting pair and the front roller drafting pair; after the second strand subsequently enters the splitting plate, and sequentially passes through the level-1 splitting teeth, the level-2 splitting teeth, and the level-3 splitting teeth of the splitting plate, dividing the second strand into several uniform fiber bundles, and calculating the linear density of each fiber bundle according to the linear density of the second strand and the number of the splitting channels in the splitting teeth; delivering each fiber bundle through the dyeing system, wherein, according to a required color of final spun colored spun yarn and the calculated linear density of each fiber bundle, a number of fiber bundles to be dyed red, a number of fiber bundles to be dyed yellow, and a number of fiber bundles to be dyed blue are calculated to obtain a corresponding color; a number of first expandable holes to be in a shrunk state starting from a leftmost side in each corresponding spindle are sequentially set according to the number of fiber bundles to be dyed red, a number of second expandable holes to be in a shrunk state starting from the leftmost side in each corresponding spindle are sequentially set according to the number of fiber bundles to be dyed yellow, a number of third expandable holes to be in a shrunk state starting from the leftmost side in each corresponding spindle are sequentially set according to the number of fiber bundles to be dyed blue; the first motor drives the red dyeing ring at the position of the first expandable hole in a shrunk state to ascend, the second motor drives the yellow dyeing ring at the position of the second expandable hole in a shrunk state to ascend, the third motor drives the blue dyeing ring at the position of the third expandable hole in a shrunk state to ascend; the fiber bundles at corresponding positions respectively contact a fully ascended red dyeing ring, a fully ascended yellow dyeing ring, and a fully ascended blue dyeing ring, and the first rotating shafts of the fully ascended red dyeing ring, the fully ascended yellow dyeing ring, and the fully ascended blue dyeing ring rotate to enable the top ends of the first left annular surfaces and the first right annular surfaces to tightly contact; and the fiber bundles pass through the inner circular surfaces of the dyeing rings to move forward to drive the inner circular surfaces of the dyeing rings to rotate, and ink in the dyeing rings is emitted and sprayed on the corresponding fiber bundles to dye the fiber bundles; delivering all the fiber bundles dyed red or yellow or blue then simultaneously through the color fixing system wherein, motor drives each color fixing ring to ascend, and when the heating circular surface of the fully ascended color fixing ring starts heating, the fiber bundle passes through the inner circular surface of the color fixing ring to achieve a color fixing process for the dyed fiber bundle, and the dyed colors of the fiber bundles are fixed; and after dyed and color-fixed fiber bundles subsequently enter the bunching bell mouth and keep moving forward in the length direction of the bunching bell mouth gathering and pressing the dyed and color-fixed fiber, bundles to obtain a compacted mixed strand with extremely weak twist; tightly pressing the compacted mixed strand is tightly pressed by the delivery roller pair, and continuously delivering the compacted mixed strand mixed strand, and twisting the delivered mixed strand with a number of twists by the ring spinning machine, to obtain final mixed colored spun yarn.
 11. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 2, wherein the splitting plate is an arc-shaped structure of ¼ of a circumference; splitting plates of the plurality of spindles of the front table board and the rear table board are integrally connected; a left end and a right end of the splitting plate are fixed at the front table board or the rear table board; splitting teeth are provided in an arc direction of the splitting plate on the each spindle; the splitting teeth comprises level-1 splitting teeth, level-2 splitting teeth, and level-3 splitting teeth, wherein the level-1 splitting teeth, the level-2 splitting teeth and the level-3 splitting teeth are sequentially connected and arranged from rear to front in the arc direction of the splitting plate; an arrangement density of the level-1 splitting teeth is less than an arrangement density of the level-2 splitting teeth, the arrangement density of the level-2 splitting teeth is less than an arrangement density of the level-3 splitting teeth; rear ends of the level-1 splitting teeth are located at a rearmost end in the arc direction of the splitting plate, and front ends of the level-3 splitting teeth are located at a frontmost end in the arc direction of the splitting plate.
 12. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 6, wherein the rear-row dyeing device comprises red dyeing rings, a first vertical rod is fixedly connected at a bottom end of the red dyeing ring, a top end of the first vertical rod is fixedly connected to the red dyeing ring, a bottom end of the first vertical rod is movably inserted in a first horizontal rod; grooves are provided in the first horizontal rod at equal intervals, a number of the grooves is the same as a number of the first vertical rods, the bottom end of the first vertical rod is movably inserted in the groove in the first horizontal rod to support the first vertical rod; first horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the first horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board; a second horizontal rod is arranged above the first horizontal rod; first expandable holes are provided in the second horizontal rod at equal intervals, the first expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the first expandable holes is the same as a number of the red dyeing rings; the first vertical rod at the bottom end of the each red dyeing ring passes through the first expandable hole, the first horizontal rods on the plurality of spindles of the front table board are integrally connected, the first horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the first horizontal rod located at a left end of the front table board is fixed on the front table board by a first vertical lifting rod, a right end point of the first horizontal rod located at a right end of the front table board is fixed on the front table board by a second vertical lifting rod, the left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board by a third vertical lifting rod, the right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board by a fourth vertical lifting rod, and the first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod are driven together by a first motor to ascend or descend; the middle-row dyeing device comprises yellow the dyeing rings, a bottom end of the yellow dyeing rings is fixedly connected to a second vertical rod, a top end of the second vertical rod is fixedly connected to the yellow dyeing ring, a bottom end of the second vertical rod is movably inserted in a third horizontal rod; grooves are provided in the third horizontal rod at equal intervals, a number of the grooves is the same as a number of the second vertical rods, the bottom end of the second vertical rod is movably inserted in the groove in the third horizontal rod to support the second vertical rod; the third horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the third horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a fourth horizontal rod is arranged above the third horizontal rod, second expandable holes are provided in the fourth horizontal rod at equal intervals, the second expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the second expandable holes is the same as a number of the yellow dyeing rings; the second vertical rod at the bottom end of the each yellow dyeing ring passes through the second expandable hole, the fourth horizontal rods on the plurality of spindles of the front table board are integrally connected, the fourth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the fourth horizontal rod located at the left end of the front table board is fixed on the front table board by a fifth vertical lifting rod, the a right end point of the fourth horizontal rod located at the right end of the front table board is fixed on the front table board by a sixth vertical lifting rod, the left end point of the fourth horizontal rod located at the left end of the rear table board is fixed on the rear table board by a seventh vertical lifting rod, the right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board by an eighth vertical lifting rod, and the fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod are driven together by a second motor to ascend or descend; and the front-row dyeing device comprises the blue dyeing rings, the bottom end of the blue dyeing rings is fixedly connected to a third vertical rod, the top end of the third vertical rod is fixedly connected to the blue dyeing ring, the bottom end of the third vertical rod is movably inserted in a fifth horizontal rod; grooves are provided in the fifth horizontal rod at equal intervals, a number of the grooves is the same as a number of the third vertical rods, the bottom end of the third vertical rod is movably inserted in the groove in the fifth horizontal rod to support the third vertical rod; the fifth horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the fifth horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a sixth horizontal rod is arranged above the fifth horizontal rod, third expandable holes are provided in the sixth horizontal rod at equal intervals, the third expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the third expandable holes is the same as a number of the blue dyeing rings; the third vertical rod at the bottom end of the each blue dyeing ring passes through the third expandable hole, the sixth horizontal rods on the plurality of spindles of the front table board are integrally connected, the sixth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the sixth horizontal rod located at the left end of the front table board is fixed on the front table board by a ninth vertical lifting rod, a right end point of the sixth horizontal rod located at the right end of the front table board is fixed on the front table board by a tenth vertical lifting rod, the left end point of the sixth horizontal rod located at the left end of the rear table board is fixed on the rear table board by an eleventh vertical lifting rod, the right end point of the sixth horizontal rod located at the right end of the rear table board is fixed on the rear table board by a twelfth vertical lifting rod, and the ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod are driven together by a third motor to ascend or descend.
 13. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 10, wherein the drafting system comprises a rear roller drafting pair formed by a rear bottom roller and a rear top rubber roller, a middle roller drafting pair formed by a middle bottom roller and a middle top rubber roller, and a front roller drafting pair formed by a front bottom roller and a front top rubber roller, wherein the rear roller drafting pair, the middle roller drafting pair and the front roller drafting pair are sequentially arranged; the roving feeding bell mouth is arranged at a rear of the rear roller drafting pair, and the splitting plate is arranged at a front of the front roller drafting pair.
 14. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 11, wherein the rear bottom roller, the middle bottom roller, and the front bottom roller have a same structure, and the rear bottom roller, the middle bottom roller and the front bottom roller are arranged from rear to front in a straight line at 45 degrees from a horizontal transverse line; each of the rear bottom roller, the middle bottom roller and the front bottom roller comprises a roller shaft, and the roller shaft is a solid cylindrical iron or steel structure; in the plurality of spindles of the front table board and the rear table board, the roller shafts of the rear bottom rollers are integrally connected, the roller shafts of the middle bottom rollers are integrally connected, and the roller shafts of the front bottom rollers are integrally connected; the roller shaft is integrally sleeved with a roller sleeve, a material of the roller sleeve is the same as a material of the roller shaft, and the roller sleeve of the each spindle is independent; the rear top rubber roller, the middle top rubber roller and the front top rubber roller have a same structure; each of the rear top rubber roller, the middle top rubber roller and the front top rubber roller comprises a rubber roller shaft, and the rubber roller shaft is a solid cylindrical iron or steel structure; wherein, a rubber roller shaft of a rear top rubber roller of a first spindle and a rubber roller shaft of a rear top rubber roller of a second spindle are integrally connected, a rubber roller shaft of a middle top rubber roller of the first spindle and a rubber roller shaft of a middle top rubber roller of the second spindle are integrally connected, a rubber roller shaft of a front top rubber roller of the first spindle and a rubber roller shaft of a front top rubber roller of the second spindle are integrally connected, and the second spindle is adjacent to and on the right side of the first spindle; the rubber roller shaft is connected to a rubber roller sleeve by a bearing, and the rubber roller sleeve is made of a rubber material; and middle portions of rubber roller shafts of the first spindle and rubber roller shafts of the second spindle are inserted in an independent gripper of a pressuring assembly to achieve connections of the rear top rubber roller, the middle top rubber roller and the front top rubber roller.
 15. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 10, wherein the splitting plate is an arc-shaped structure of ¼ of a circumference; splitting plates of the plurality of spindles of the front table board and the rear table board are integrally connected; a left end and a right end of the splitting plate are fixed at the front table board or the rear table board; splitting teeth are provided in an arc direction of the splitting plate on the each spindle; the splitting teeth comprises level-1 splitting teeth, level-2 splitting teeth, and level-3 splitting teeth, wherein the level-1 splitting teeth, the level-2 splitting teeth and the level-3 splitting teeth are sequentially connected and arranged from rear to front in the arc direction of the splitting plate; an arrangement density of the level-1 splitting teeth is less than an arrangement density of the level-2 splitting teeth, the arrangement density of the level-2 splitting teeth is less than an arrangement density of the level-3 splitting teeth; rear ends of the level-1 splitting teeth are located at a rearmost end in the arc direction of the splitting plate, and front ends of the level-3 splitting teeth are located at a frontmost end in the arc direction of the splitting plate.
 16. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 10, wherein the dyeing system is arranged at the front of the splitting plate of the each spindle, the dyeing system comprises a rear-row dyeing device, a middle-row dyeing device, and a front-row dyeing device, and the rear-row dyeing device, the middle-row dyeing device, and the front-row dyeing device are arranged in parallel in the front-rear direction.
 17. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 16, wherein the rear-row dyeing device comprises red dyeing rings, a number of the red dyeing rings is the same as a number of splitting channels in the level-3 splitting teeth, and the red dyeing rings are located right in front of the splitting channels in the level-3 splitting teeth; the middle-row dyeing device comprises yellow dyeing rings, a number of the yellow dyeing rings is the same as the number of the red dyeing rings, and the yellow dyeing rings are located right in front of the red dyeing rings; the front-row dyeing device comprises blue dyeing rings, a number of the blue dyeing rings is the same as the number of the red dyeing rings, and the blue dyeing rings are located right in front of the red dyeing rings; the red dyeing rings are connected to a red ink cartridge by an ink channel, the yellow dyeing rings are connected to a yellow ink cartridge by an ink channel, and the blue dyeing rings are connected to a blue ink cartridge by an ink channel; the red dyeing rings, the yellow dyeing rings, and the blue dyeing rings have a same structure of an annular shape; the annular shape comprises a first left annular surface and a first right annular surface, a bottom end of the first left annular surface and a bottom end of the first right annular surface are connected by a first rotating shaft controlled by a motor, a top end of the first left annular surface and a top end of the first right annular surface are not connected; an inner circular surface of the annular shape of each dyeing ring is a first rotating circular surface, and when the first rotating shaft rotates to enable the top end of the first left annular surface and the top end of the first right annular surface to tightly contact, a strand passes through the inner circular surface to move forward to drive the inner circular surface to rotate, and red ink in the red dyeing rings, yellow ink in the yellow dyeing rings, and blue ink in the blue dyeing rings are emitted and sprayed on the strand.
 18. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 16, wherein the rear-row dyeing device comprises red dyeing rings, a first vertical rod fixedly connected at a bottom end of the red dyeing ring, a top end of the first vertical rod is fixedly connected to the red dyeing ring, a bottom end of the first vertical rod is movably inserted in a first horizontal rod; grooves are provided in the first horizontal rod at equal intervals, a number of the grooves is the same as a number of the first vertical rods, the bottom end of the first vertical rod is movably inserted in the groove in the first horizontal rod to support the first vertical rod; first horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the first horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board; a second horizontal rod is arranged above the first horizontal rod; first expandable holes are provided in the second horizontal rod at equal intervals, the first expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the first expandable holes is the same as a number of the red dyeing rings; the first vertical rod at the bottom end of the each red dyeing ring passes through the first expandable hole, the first horizontal rods on the plurality of spindles of the front table board are integrally connected, the first horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the first horizontal rod located at a left end of the front table board is fixed on the front table board by a first vertical lifting rod, a right end point of the first horizontal rod located at a right end of the front table board is fixed on the front table board by a second vertical lifting rod, the left end point of the first horizontal rod located at the left end of the rear table board is fixed on the rear table board by a third vertical lifting rod, the right end point of the first horizontal rod located at the right end of the rear table board is fixed on the rear table board by a fourth vertical lifting rod, and the first vertical lifting rod, the second vertical lifting rod, the third vertical lifting rod, and the fourth vertical lifting rod are driven together by a first motor to ascend or descend; the middle-row dyeing device comprises yellow the dyeing rings, a bottom end of the yellow dyeing rings is fixedly connected to a second vertical rod, a top end of the second vertical rod is fixedly connected to the yellow dyeing ring, a bottom end of the second vertical rod is movably inserted in a third horizontal rod; grooves are provided in the third horizontal rod at equal intervals, a number of the grooves is the same as a number of the second vertical rods, the bottom end of the second vertical rod is movably inserted in the groove in the third horizontal rod to support the second vertical rod; the third horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the third horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a fourth horizontal rod is arranged above the third horizontal rod, second expandable holes are provided in the fourth horizontal rod at equal intervals, the second expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the second expandable holes is the same as a number of the yellow dyeing rings; the second vertical rod at the bottom end of the each yellow dyeing ring passes through the second expandable hole, the fourth horizontal rods on the plurality of spindles of the front table board are integrally connected, the fourth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the fourth horizontal rod located at the left end of the front table board is fixed on the front table board by a fifth vertical lifting rod, a right end point of the fourth horizontal rod located at the right end of the front table board is fixed on the front table board by a sixth vertical lifting rod, the left end point of the fourth horizontal rod located at the left end of the rear table board is fixed on the rear table board by a seventh vertical lifting rod, the right end point of the third horizontal rod located at the right end of the rear table board is fixed on the rear table board by an eighth vertical lifting rod, and the fifth vertical lifting rod, the sixth vertical lifting rod, the seventh vertical lifting rod, and the eighth vertical lifting rod are driven together by a second motor to ascend or descend; and the front-row dyeing device comprises the blue dyeing rings, the bottom end of the blue dyeing rings is fixedly connected to a third vertical rod, the top end of the third vertical rod is fixedly connected to the blue dyeing ring, the bottom end of the third vertical rod is movably inserted in a fifth horizontal rod; grooves are provided in the fifth horizontal rod at equal intervals, a number of the grooves is the same as a number of the third vertical rods, the bottom end of the third vertical rod is movably inserted in the groove in the fifth horizontal rod to support the third vertical rod; the fifth horizontal rods on the plurality of spindles of the front table board and the rear table board are respectively integrally connected, end points of the fifth horizontal rods located at the two ends of the front table board and the rear table board are respectively fixed on the front table board and the rear table board, a sixth horizontal rod is arranged above the fifth horizontal rod, third expandable holes are provided in the sixth horizontal rod at equal intervals, the third expandable hole at a same position in the each spindle is controlled by a separate motor to expand or shrink, a number of the third expandable holes is the same as a number of the blue dyeing rings; the third vertical rod at the bottom end of the each blue dyeing ring passes through the third expandable hole, the sixth horizontal rods on the plurality of spindles of the front table board are integrally connected, the sixth horizontal rods on the plurality of spindles of the rear table board are integrally connected, a left end point of the sixth horizontal rod located at the left end of the front table board is fixed on the front table board by a ninth vertical lifting rod, a right end point of the sixth horizontal rod located at the right end of the front table board is fixed on the front table board by a tenth vertical lifting rod, the left end point of the sixth horizontal rod located at the left end of the rear table board is fixed on the rear table board by an eleventh vertical lifting rod, the right end point of the sixth horizontal rod located at the right end of the rear table board is fixed on the rear table board by a twelfth vertical lifting rod, and the ninth vertical lifting rod, the tenth vertical lifting rod, the eleventh vertical lifting rod, and the twelfth vertical lifting rod are driven together by a third motor to ascend or descend.
 19. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 10, wherein the color fixing system comprises color fixing rings, a number of the color fixing rings is the same as a number of the blue dyeing rings; the color fixing rings are located right in front of the blue dyeing rings; a bottom end of the color fixing ring is fixedly connected to a fourth vertical rod, a top end of the fourth vertical rod is fixedly connected to the color fixing ring, a bottom end of the fourth vertical rod is fixed on a seventh horizontal rod, the seventh horizontal rods on the plurality of spindles of the front table board are integrally connected, the seventh horizontal rods on the plurality of spindles of the rear table board are integrally connected; a left end point of the seventh horizontal rod located at the left end of the front table board is fixed on the front table board by a thirteenth vertical lifting rod, a right end point of the seventh horizontal rod located at the right end of the front table board is fixed on the front table board by a fourteenth vertical lifting rod, the left end point of the seventh horizontal rod located at the left end of the rear table board is fixed on the rear table board by a fifteenth vertical lifting rod; the right end point of the seventh horizontal rod located at the right end of the rear table board is fixed on the rear table board by a sixteenth vertical lifting rod; the thirteenth vertical lifting rod, the fourteenth vertical lifting rod, the fifteenth vertical lifting rod, and the sixteenth vertical lifting rod are driven together by a fourth motor to ascend or descend; the color fixing ring has an annular shape, the annular shape comprises a second left annular surface and a second right annular surface, a bottom end of the second left annular surface and a bottom end of the second right annular surface are connected by a second rotating shaft controlled by a motor, a top end of the second left annular surface and a top end of the second right annular surface are not connected; an inner circular surface of the annular shape of the color fixing ring is a heating circular surface, when the second rotating shaft rotates to enable the top ends of the second left annular surface and the second right annular surface to close, the heating circular surface starts heating, and when the second rotating shaft rotates to enable the top end of the second left annular surface and the top end of the second right annular surface to be disengaged, the heating circular surface stops heating.
 20. The production apparatus for colored spun yarn with fiber dyeing and mixing in the spinning process according to claim 10, wherein the bunching bell mouth device comprises a level-1 bell mouth, a level-2 bell mouth, and a level-3 bell mouth; the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth are sequentially fixed, connected, and arranged from rear to front in a length direction of the bunching bell mouth; the diameters of the level-1 bell mouth, the level-2 bell mouth, and the level-3 bell mouth gradually decreases, and the delivery roller pair is added at a front of the bunching bell mouth. 